From: Amirreza Zarrabi amirreza.zarrabi@oss.qualcomm.com
Kernel clients can open a TEE context and invoke regular TA commands through tee_client_invoke_func(). However, there is currently no equivalent helper for invoking TEE objects.
Add tee_client_object_invoke_func() as a kernel client API for issuing object invocation requests. The helper checks that the backend provides object_invoke_func() before forwarding the request by setting the origin as TEE_OBJECT_INVOKE_KERNEL. This allows TEE backends to support privileged object-based calls from the kernel-space.
Co-developed-by: Harshal Dev harshal.dev@oss.qualcomm.com Signed-off-by: Harshal Dev harshal.dev@oss.qualcomm.com Signed-off-by: Amirreza Zarrabi amirreza.zarrabi@oss.qualcomm.com --- drivers/tee/tee_core.c | 12 ++++++++++++ include/linux/tee_drv.h | 13 +++++++++++++ 2 files changed, 25 insertions(+)
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index 30901390149c..a03a3d645dd1 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -1404,6 +1404,18 @@ int tee_client_invoke_func(struct tee_context *ctx, } EXPORT_SYMBOL_GPL(tee_client_invoke_func);
+int tee_client_object_invoke_func(struct tee_context *ctx, + struct tee_ioctl_object_invoke_arg *arg, + struct tee_param *param) +{ + if (!ctx->teedev->desc->ops->object_invoke_func) + return -EINVAL; + + return ctx->teedev->desc->ops->object_invoke_func(ctx, arg, param, + TEE_OBJECT_INVOKE_KERNEL); +} +EXPORT_SYMBOL_GPL(tee_client_object_invoke_func); + int tee_client_cancel_req(struct tee_context *ctx, struct tee_ioctl_cancel_arg *arg) { diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h index f3c5e106d853..369c87ad0205 100644 --- a/include/linux/tee_drv.h +++ b/include/linux/tee_drv.h @@ -283,6 +283,19 @@ int tee_client_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, struct tee_param *param);
+/** + * tee_client_object_invoke_func() - Invoke a TEE object from kernel space + * @ctx: TEE Context + * @arg: Invoke arguments, see description of + * struct tee_ioctl_object_invoke_arg + * @param: Parameters for the object invocation + * + * Return: On success, returns 0; on failure, returns < 0. + */ +int tee_client_object_invoke_func(struct tee_context *ctx, + struct tee_ioctl_object_invoke_arg *arg, + struct tee_param *param); + /** * tee_client_cancel_req() - Request cancellation of the previous open-session * or invoke-command operations in a Trusted Application